Hirsh, S. P. (1971). The Courage to change: New directions for career education. Englewood Cliffs.
Chicago-viite (17. p.)Hirsh, Sharlene Pearlman. The Courage to Change: New Directions for Career Education. Englewood Cliffs, N. J: Englewood Cliffs, 1971.
MLA-viite (9. p.)Hirsh, Sharlene Pearlman. The Courage to Change: New Directions for Career Education. Englewood Cliffs, 1971.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.